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Ryan
185
How to obtain line color from scatterchart
posted

I am using a scatterchart with connect with lines property enabled.  I'm trying to match the color of the line with the associated treeview item so i need to grab the color from the scatterchart line.  It is set to pure random right now.  I am also using series and adding each series to the ultrachart in case that matters.

 

this->ucLineChart->ColorModel->ModelStyle = Infragistics::UltraChart::Shared::Styles::ColorModels::PureRandom;

 

To recap:

I have a System::color variable that just needs to grab the correct color from a scatter chart set with pure random for the color model.

 

Thanks!

  • 185
    Verified Answer
    posted

    I ended up finding a very easy solution.  Inside my main form load event i have the following:

     

    this->ucLineChart->ColorModel->CustomPalette = gcnew cli::array<Color> {Color::Red, Color::Orange, Color::Yellow, Color::Green,Color::Blue, Color::Indigo, Color::Violet}; 

    this->ucLineChart->ColorModel->ModelStyle = Infragistics::UltraChart::Shared::Styles::ColorModels::CustomLinear;

     

    Then I add the the lines one by one using each series and after each load of a series, i grab the color like so:

    color = this->ucLineChart->ColorModel->CustomPalette[(ucLineChart->Series->Count - 1) % 7];

  • 2406
    posted

    Hi,

    Try using the ChartDrawItem event for the current line:

    protected void Page_Load(object sender, EventArgs e)
    {
        .............................
        UltraChart1.ChartDrawItem += new Infragistics.UltraChart.Shared.Events.ChartDrawItemEventHandler(UltraChart1_ChartDrawItem);
        UltraChart1.DataSource = DemoTable.Table(3);
        UltraChart1.DataBind();
    }

    void UltraChart1_ChartDrawItem(object sender, Infragistics.UltraChart.Shared.Events.ChartDrawItemEventArgs e)
    {
        if (e.HasData)
        {
            if (e.Primitive is Polyline)
            {
                //e.Primitive.PE.Fill gives the color of the current line
            }
        }
    }